package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;
    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();

        BeanUtils.copyProperties(setmealDTO, setmeal);
        // 向套餐表插入数据，获取插入后的id
        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        if (setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish ->  {
                // 设置当前菜品的套餐id
                setmealDish.setSetmealId(setmealId);
            });
        }
        // 向套餐菜品关系表插入n条数据
        setmealDishMapper.insertBatch(setmealDishes);
    }
    /**
     * 根据id查询套餐和对应的菜品
     * @param id
     * @return
     */

    public SetmealVO getByIdWithDish(Long id) {
        //根据id查询套餐数据
        Setmeal setmeal=setmealMapper.getById(id);
        //根据套餐id查询菜品数据
        List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);
        //将查询到的数据封装到VO
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        //MyBatis分页插件开启分页
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());

        //底层通过拦截器拦截，将分页sql语句拼接起来
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        //返回结果
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前删除的套餐状态，是否可以删除
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                //当前套餐
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId-> {
            //删除套餐表中数据
            setmealMapper.deleteById(setmealId);
            //删除套餐和菜品的关联数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    public void updateWithDish(SetmealDTO setmealDTO){
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐
        setmealMapper.update(setmeal);
        //删除套餐和菜品的关联数据
        Long setmealId = setmealDTO.getId();
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }
    /**
     * 套餐起售停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        if(status == StatusConstant.ENABLE){
            List<Dish> dishlist = dishMapper.getBySetmealId(id);
            if (dishlist != null && dishlist.size() > 0){
                dishlist.forEach((dish->{
                    if (dish.getStatus() == StatusConstant.DISABLE){
                        throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }));
            }
        }

        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
